Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
154741 | Chemical Engineering Science | 2015 | 7 Pages |
•SBMABR adopted intermittent aeration and artificially enhanced biofilm shedding.•The COD, nitrogen and phosphorus were removed simultaneously in a single SBMABR.•Intermittent aeration and periodic backwashing enhanced phosphorus removal.
A sequencing batch membrane-aerated biofilm reactor (SBMABR) combined with intermittent aeration and artificially enhanced biofilm shedding was employed to enhance biological nitrogen and phosphorus removal. A long-term running of 112 days was applied to evaluate the performances of SBMABR. The removal efficiencies of chemical oxygen demand (COD), NH4+–N, total nitrogen (TN) and total phosphorus (TP) in SBMABR were maintained above 90%, 96%, 91% and 85% respectively. The periodic backwashing could control the biomass effectively. The stable and abundant amoA and nirS genes were beneficial to maintain the high removal efficiency of SBMABR. Real-time PCR results revealed that SBMABR created the suitable survival environment for ammonia oxidizing bacteria (AOB) and denitrifying bacteria.